Q.New Zealand Flax (phormium) Has Had All Its Leaves Bitten Off. What Will Have Done That And Will It Survive?
I am in NW England and back onto a farm with very few farm animals

Certified GKH Gardening Expert
Do you have visiting dear? The article below says these plants are generally deer resistant but they will eat anything if hungry enough.
http://sonomamg.ucanr.edu/Plant_of_the_Month/Phormium/
https://www.gardeningknowhow.com/ornamental/foliage/new-zealand-flax/new-zealand-flax-plant-care.htm
https://www.gardeningknowhow.com/plant-problems/pests/animals/camouflage-gardening.htm